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(C) In a semiconductor crystal,the lattice constant represents the spacing between atoms. When the lattice constant decreases,the atoms are brought cl

Vedclass · Accepted Answer

$E_c$ and $E_v$ increase,but $E_g$ decreases

Vedclass · Answer

(C) In a semiconductor crystal,the lattice constant represents the spacing between atoms. When the lattice constant decreases,the atoms are brought closer together,which increases the overlap of atomic orbitals. This increased overlap leads to a broadening of the energy bands,meaning the widths of the conduction band $(E_c)$ and the valence band $(E_v)$ increase. Simultaneously,the increased interaction between atoms results in a decrease in the band gap $(E_g)$. Therefore,$E_c$ and $E_v$ increase,while $E_g$ decreases.

If the lattice constant of this semiconductor is decreased,then which of the following is correct?

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